import sys
from typing import List, Tuple

int1 = lambda x: int(x) - 1
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))
input = lambda: sys.stdin.readline().rstrip('\n')


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def main():
    n = int(input())
    p = float(input())
    if n >= 200:
        return 1
    else:
        return 1 - (1 - p) ** n


def _start():
    ret = main()

    if ret is not None:
        if isinstance(ret, List) or isinstance(ret, Tuple):
            print(*ret)
        else:
            print(ret)


if __name__ == '__main__':
    _start()